LEGRAND Raritan PX3TS User Manual page 786

Appendix D: Bulk Configuration or Firmware Upgrade via DHCP/TFTP
766
Configure the same option in DHCP accordingly. The PX3TS accepts the
configuration or firmware upgrade only when this value in DHCP matches.
3. Set the following three sub-options in the "vendor-encapsulated-options"
(option 43).
▪
code 1 (pdu-tftp-server) = the TFTP server's IPv4 address
▪
code 2 (pdu-update-control-file) = the name of the control file
"fwupdate.cfg"
▪
code 3 (pdu-update-magic) = any string
This third option/code is the magic cookie to prevent the fwupdate.cfg
commands from being executed repeatedly. It does NOT matter
whether the IPv4 magic cookie is identical to or different from the IPv6
magic cookie.
The magic cookie is a string comprising numerical and/or alphabetical
digits in any format. In the following illustration diagram, it is a
combination of a date and a serial number.
Important: The magic cookie is transmitted to and stored in PX3TS at the
time of executing the "fwupdate.cfg" commands. The DHCP/TFTP
operation is triggered only when there is a mismatch between the magic
cookie in DHCP and the one stored in PX3TS. Therefore, you must modify
the magic cookie's value in DHCP when intending to execute the
"fwupdate.cfg" commands next time.